The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 20, 2018
Filed:
May. 22, 2015
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Daisuke Shimo, Hiroshima, JP;
Sangkyu Kim, Higashihiroshima, JP;
Kazunori Hirabayashi, Hiroshima, JP;
Makoto Namba, Kure, JP;
Masahiro Miyazaki, Hiroshima, JP;
Yudai Kato, Hiroshima, JP;
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Abstract
A diesel engine includes a piston, a cylinder head, and a fuel injector. The fuel injector has a valve body with bored nozzle holes in its tip part. A cavity having a circular shape in plan view is formed in a crown surface of the piston to concave to the counter cylinder head side. A wall surface constituting the cavity has a central ridge portion bulging toward the fuel injector while bulging larger toward the center of the cavity, a periphery concave portion formed radially outward of the central ridge portion to concave radially outward, and a lip portion formed between the periphery concave portion and the crown surface to convex radially inward. A lip radius R, a nozzle hole length L, a nozzle hole diameter D, and a bore radius B are designed to satisfy the following equation:99.4×(1−3)×(+2.7)≦≦min{237.1×(1−3)×(0.8+1),2/3}.